The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life.

This timeline captures the major milestones in Earth’s geological, biological, and climate evolution – from the first microbes to the looming effects of human-driven climate change. Watch the …

Geoscientists use the geological time scale to assign relative age names to events and rocks, separating major events in Earth’s history based on significant changes as recorded in rocks …

Jul 29, 2025 · The history of Earth is not just a record of rocks and organisms—it is a story of transformation, resilience, and wonder. From a fiery ball of molten rock to a cradle of …

Geologic history of Earth, evolution of the continents, oceans, atmosphere, and biosphere; the layers of rock at Earth’s surface contain evidence of the evolutionary processes undergone by …

Apr 16, 2025 · Here is the origin story of Earth—the only place we know life to exist. The Big Bang brought the universe into existence more than 13 billion years ago. But it wasn't until much …

Jul 23, 2025 · Origin and Evolution of Earth: Earth was formed around 4.54 billion years ago. Early theories like the Nebular Hypothesis, Revised Nebular Hypothesis, Binary Theories, etc. …

Oct 17, 2024 · As we explore these questions, we'll uncover the key milestones that have defined Earth's history and gain a deeper appreciation for the intricate web of life that continues to evolve.

Nov 20, 2023 · Dive into the most dramatic events in Earth’s 4.5-billion-year history, from its birth to the emergence of humanity. How did a hellscape of molten lava transform into a lush, …

Due to plate tectonics, Earth’s land is constantly shifting and changing over time. 250 million years ago, all of Earth’s landmass was united in a single supercontinent called Pangaea.